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| Author | Device | Sensitivity (%) | Specificity (%) | PPV | NPV | AUC | Accuracy (%) |
|---|---|---|---|---|---|---|---|
| Machado(14) | Cyranose | 71.4 | 91.9 | 66.6 | 93.4 | 85 | |
| Phillips (22) | GC-MS | 84.6 | 80.0 | 0.88 | |||
| Mazzone (27) | Colorimetric | 73.3 | 72.4 |
PPV, positive predictive value; NPV, negative predictive value; AUC, Area Under the Curve (AUC) of the receiver operating characteristic curve (ROC).
